I have a Toshiba Satelite L555 running Win 7 x64.
I install the driver from the disk that came with the lead and is within a Windows 7 x64 folder so assume it is the correct one as per this link:
http://www.kawagebo.net/eb/manual/PL2303_Prolific_GPS_1013_20090319.zip
It appears to install successfully and I get a confirmation window to state that. However when I plug the lead in I get the new device found - installing driver window at the bottom right of my screen and I hear a couple of confirmation beeps a few seconds apart. After about 40 seconds though the window is replaced with a 'failed' window to say the driver could not be installed?
As I said above, the device driver has the Code 10 message.